PLS HELP I DONT UNDERSTAND !

If you were constructing a triangular frame, and you had wood in the length of 4inches, 4 inches, and 7 inches, would it make a triangle? would you be able to create a frame from these pieces of wood?

Find the slope of the line that passes through the points (-2, 4) and (-5, -6). -2/7 10/3 -2/3

Indicate the equation of the given line in standard form. the line containing the longer diagonal of a quadrilateral whose vertices are a (2, 2), b(-2, -2), c(1, -1), and d(6, 4).